the cg shift is not caused by just the battery its the absence of a heavy engine tranny and other iron as well as a fuel tank above that help too the battery itself is heavy and is going to stay heavy because its well protected from impacts and is actively watercooled ie contains plumbing and coolant i had the privilege to drive a model s in vienna a few weeks ago and i got ta say it was the best handling car ive ever driven im definitely buying one as soon as the supercharger network gains a foothold here in europe less than years